It is simply that a specific part of their culture has been destroyed. A culture based on work, rising wages, strict unspoken rules against disorder, obligatory collaboration and mutual aid. It all had to go, and the means of destroying it was the long-term unemployment millions of people had to suffer in the 1980s.
Thatcherite culture celebrated the chancers and the semi-crooks: people who had been shunned in the solidaristic working-class towns became the economic heroes of the new model – the security-firm operators, the contract-cleaning slave drivers; the outright hoodlums operating in plain sight as the cops concentrated on breaking strikes.
We thought we could ride the punches. But the great discovery of the modern right was that you only have to do this once. Suppress paternalism and solidarity for one generation and you create multigenerational ignorance and poverty. Convert Labour to the idea that wealth will trickle down, and to attacks on the undeserving poor, and you remove the means even to acknowledge the problem, let alone solve it.
It really isn’t entirely obvious that it was Fatcher who destroyed the respectable working class.